Material Selection Guide: Aluminum, Stainless Steel, and Titanium Alloy Comparison
Compare aluminum, stainless steel, and titanium for CNC machining. Analyze strength, weight, cost
Light and chemical-resistant — the value performer
PP (polypropylene) has a density of approximately 0.9g/cm³, making it the lightest common plastic. It resists most acids, alkalis, solvents and oils, is non-absorbent and stress-crack resistant, widely used in chemical equipment and laboratory consumables.
PP machines well, achieving smooth surfaces with sharp tools. Its melting point is relatively low (approximately 160°C), requiring cutting temperature control to avoid material melting, tool clogging and surface tearing.
PP is tough and weldable with low raw material cost, suitable for large-volume production of chemical tanks, pump and valve parts, laboratory consumables and automotive interior trim. We specialize in batch production, 100 pcs MOQ, lead time 15-25 days.
The following table lists typical mechanical, thermal, and physical properties for this material. Actual values may vary by grade and temper.
| Property | Value | Unit |
|---|
We stock multiple grades for different application needs. Each grade offers distinct properties optimised for specific uses — click to view detailed specifications, machining advice and typical applications.
Homopolymer PP is stiffer and more heat resistant, for structural parts needing slightly higher temperature.
View Details CopolymerCopolymer PP has better impact resistance and stays tough at low temperature for impact-loaded parts.
View Details GF ReinforcedGlass fibre markedly raises stiffness, heat resistance and lowers shrinkage for tight-tolerance structures.
View Details FR GradeFlame-retardant PP reaches UL94 V-0 for electrical housings and flame-rated structures.
View Details Food GradeFood-contact compliant PP, odourless and non-toxic, for food machinery and packaging equipment.
View Details UV ResistantUV-stabilised for long-term outdoor service, slowing ageing and colour change.
View DetailsA selection of parts machined from this material.
This material is widely used across multiple industries for various applications, from precision prototypes to end-use production parts.
Surgical instruments, housings
Structural brackets, panels
Engine components, housings
Heat sinks, enclosures
Motor mounts, brackets
Fixtures, jigs, tooling
Frames, handles, cases
Fittings, valves, hardware
| Finish Type | Description | Ra (typical) |
|---|
The questions engineers ask most about machining, surface quality and selecting this material.
Related to PP (Polypropylene)
Related to PP (Polypropylene)
Compare aluminum, stainless steel, and titanium for CNC machining. Analyze strength, weight, cost
Compare 6061 vs. 7075 aluminum for CNC machining, covering strength, cutting parameters, and finishes to balance cost and efficiency for precision par…
Based on experience with 72 CNC machines, we analyze root causes of aluminum tolerance issues. Covers material selection and DFA for precise control.
Related to PP (Polypropylene)
In-depth guide to CNC machining covering 3/5-axis milling and turning. Optimized for engineers and buyers to enhance precision and efficiency.
Analyze aluminum CNC machining costs. Covers 6061/7075/5052 specs, process optimization, and DFM design to boost supply chain efficiency.
Related to PP (Polypropylene)
Based on 72 CNC machines, here are 10 design rules for aluminum precision. Cover wall thickness, tolerance, and DFM to prevent scrap, ensure ±0.01mm a…
Learn how CNC tolerances impact aluminum part quality and cost. Explore ISO 2768, GD&T, and surface finish.
Learn the 10 fundamental design rules for CNC machining that will reduce costs, improve quality, and accelerate production.
Send your STEP / DWG / PDF drawing and get a detailed quote with free DFM analysis and process recommendations within 2 hours. No minimum order — from 1 piece.